Finding the Fourth Proportional to 1,901.76, 2,851.86 and 790.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,901.76 : 2,851.86 = 790.42 : x
2. Step 2: Convert to fraction form
   1,901.76/2,851.86 = 790.42/x
3. Step 3: Cross multiply
   1,901.76x = 2,851.86 × 790.42
4. Step 4: Simplify right side
   1,901.76x = 2,254,160.34
5. Step 5: Solve for x
   x = 2,254,160.34/1,901.76
6. Step 6: Final answer
   x = 1,185.30